Razor blade holder



FIG. 1 is a right side elevational view of a razor blade holder showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front end view thereof;

FIG. 4 is a rear end view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a top plan view thereof. 

The ornamental design for a razor blade holder, as shown. 